Auto gearbox fault

Hi I hope some one can help
My td4 auto has a intermittent fault when hot and in auto or manual and it selects 4th it looses drive some times then drops down to 3rd or lower !!
When it selects some gears does not seam as smooth as it should be .
I have checked fault codes using a t4 = none
I have done a resistance check at the ECU = using auto range multi meter
Pin 17 to pin
3 =003.6
4= 018.7
18= 003.8
15= 018.7
14= 019.0
52= 018.0
53= 019.5
10=018.8
16= 014.6

Pin20 to
39= 1.083 aft temp 34oC
5= 0.606
24= 0.605
21= unable to get any reading at all ?? Intermediate speed sensor ??
If this is faulty why does it drive ok cold and only affecting 4th ??
Hope this makes sense to some one ??
How easy is it to change the sensor ??
Thanks

What year is it? The intermediate speed sensor failed on some Jatco's. Later auto computers ignored the signal from the intermediate sensor. We assume the sensor wasn't fitted on later Jatco's. This could be the reason why yer int got a resistance on it.

Have you checked the barrel connectors are tight together?

An auto oil change can do wonders and solve all sorts of strange faults. If you try this then make sure you follow the correct procedure and don't undo the wrong bolt.

http://www.landyzone.co.uk/lz/f9/jatco-automatic-gearbox-69336-5.html

Hi
It's a 2004
Done 120k
I did a oil change last year when I got it.
The box has been reconditioned at some point (previous owner )
Thanks

Def90v8 said:

Hi
It's a 2004
Done 120k
I did a oil change last year when I got it.
The box has been reconditioned at some point (previous owner )
Thanks

Click to expand...

What fluid did you put in the box and was the level reasonable accurate?

Hi
I used genuine Land Rover oil
And measured oil temp till correct and levelled off oil

Def90v8 said:

Hi
I used genuine Land Rover oil
And measured oil temp till correct and levelled off oil

Click to expand...

What was the oil like which came out? Did it smell burnt or have lots of bits in it?

HI update this morning while in outside lane doing 70ish
gear box went into limp home f4 hdc amber light
fault code p 1748 2/4 brake solinoid fault ? any one know which one this is and the part number ??
thanks

Documents in this fred will help:

http://www.landyzone.co.uk/lz/f9/jatco-solenoids-sensors-193211.html

Check the wiring to see if there's a loose/broken connection. You never know.

Hi, I know this is an old post but my Freelander is displaying very similar symptoms. I am in the process of replacing solenoids and was wondering if replacing the 2/4 brake duty solenoid resolved your issue?